<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.transitionbox{
				width: 100px;
				height: 100px;
				background-color:pink;
				border: 2px solid;
				
				transition:  2s;
				
			}
			.transitionbox:hover{
				width: 300px;
				height: 300px;
			}
		</style>
	</head>
	<body>
		<h3>拉伸盒子的动画效果</h3>
		<h5>transition 它有两个参数：拉伸的方向width，2S动画的执行时间</h5>
		
		<div class="transitionbox">
			
		</div>
	</body>
</html>
